DTC 71

DTC 71: Different Diameter Tire
1. Clear the DTC.
2. Test-drive the vehicle.
Does the ABS indicator come on, and is DTC 71 indicated?
YES - Go to step 3.
NO - Intermittent failure; the vehicle is OK at this time.
3. Check that all 4 tires are the specified size and are inflated to the proper specification.
Are all 4 tires the correct size and properly inflated?
YES - Go to step 4.
NO - Install the correct tires or set the tires to the correct inflation, and retester
4. With the car on level ground, mark each tire with a small spot of grease. Roll the car until each of the tires makes 2 grease spots on the floor.
5. Measure and record the distance between the 2 grease spots.
Is the distance between the shortest and the longest measurement more than 10%?
YES - Replace the tire/tires that is smaller or larger than the others.
NO - Replace the ABS/TCS modulator-control unit.